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    Physico-chemical properties of Kaolin-organic acid by Yeo, S.W., Ling, Felix Ngee Leh, Low, V. S., Toh, K. L.

    Published 2017
    “…The organic acid which consists of humic acid and fulvic acid was extracted from highly humificated plant–based compost. The effect of organic acid on the physico-chemical properties of soil was determined by varying the concentration of organic acid. …”
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